randi, tonight's shot, comedian stephen colbert facing one of your tougher audiences. he was in congress today, the unlikely star in a house subcommittee hearing on the plight of migrant farm workers. he stayed in character nearly the entire time. and his testimony -- you know had a bunch of folks laughing but a lot of others complained it was just a stunt and wasted the time of lawmakers at taxpayer expense. >> as we've heard this morning, america's farms are presently far too dependent on immigrant labor to pick our fruits and vegetables. now, the obvious answer is for all of us to stop eating fruits and vegetables. and if you look at the recent obesity statistics, you'll see that many americans have already started. unfortunately, my gastroenterolist, dr. eichler, has informed me in no uncertain terms that they're a necessary source of roughage. i would like to submit a video of my colonoscopy into the record. i started my day with reconceived notions of migrant labor. but after working with these men and women, picking beans, packing corn for hours on end side by s